BIO 30_Lec 5_Quiz_Chemical Basis of Heredity

Which of the following is not true of the genetic material according to HJ Muller?

• Can carry all necessary biological information
• It should not mutate.
• Has stable molecular structure.
• It can duplicate itself.

The scientist who observed that an avirulent strain of Streptococcus pneumoniae was transformed to become virulent and declared the presence of the transforming principle.

• Edmund Wilson
• Frederick Griffith
• Ernst Haeckel
• Fredrich Misher

Who are the scientists who proved that DNA is the genetic material of bacterial viruses (phages)?

• Wilkins and Franklin
• Zinder and Lederberg
• Hershey and Chase
• Avery, MacLeod and McCarty

The components of a DNA nucleotide

• D-ribose
• Nitrogen Base
• Phosphate group
• 2 Deoxy-D-ribose

RNA differs from DNA in that RNA

• is antiparallel

• contains ribose as its sugar

• contains uracil instead of thymine

• is single stranded

The mode of DNA replication:

• Conservative
• Semi-conservative
• Non-Conservative
• Dispersive

The following proteins/enzymes are needed during initiation of replication except

• Ligase
• Singe Strand Binding Proteins
• Gyrase
• Helicase

Which is not true about the Okazaki fragments?

• Synthesized discontinuously
• provides 3'OH
• 1000-2000 nucleotides in prokaryotes
• short sequences

The leading and lagging strands are synthesized one after the other.

• True
• False